Measurement of biosignals of a user

ABSTRACT

An information processing apparatus includes a retaining unit, an image acquisition unit, an image processor, a comparator, and an image generator. The retaining unit is configured to retain a defined attachment position being an attachment position of a biological detection sensor with respect to a body site of a user, the defined attachment position being defined in advance. The image acquisition unit is configured to acquire a capture image captured by an imaging unit. The image processor is configured to extract, from the capture image, a body shape of the user. The comparator is configured to compare the body shape with the defined attachment position. The image generator is configured to generate, based on a comparison result by the comparator, a display image to be displayed on a display unit.

The present application is a continuation application of U.S. patentapplication Ser. No. 13/947,757, filed Jul. 22, 2013, which claims thebenefit of priority from prior Japanese Priority Patent Application JP2012-173357 filed in the Japan Patent Office on Aug. 3, 2012. Each ofthe above-referenced applications is hereby incorporated herein byreference in its entirety.

BACKGROUND

The present disclosure relates to an information processing apparatus, aprogram, and a biosignal measurement set that pertain to biosignalmeasurement carried out with a biosignal measurement sensor attached toa body of a user.

In medical home monitoring, a patient brings an apparatus back home andoperates the apparatus himself or herself to measure a biosignal, and adoctor makes a diagnosis based on a measurement result thereof. However,a patient with no expertise who is unfamiliar with the apparatus mayperform attachment of sensors and operations of the apparatus. As aresult, in some cases, correct attachment of the sensors is notperformed and an accurate diagnosis is not made based on the obtainedmeasurement value.

Regarding an attachment support method for a sensor, for example,Japanese Patent Application Laid-open No. 2003-159225 (hereinafter,referred to as Patent Document 1) discloses an electrode wire retainerfor an electroencephalographic measurement apparatus that enables easyrecognition of attachment positions by an electrode holder on which ahead is drawn. Further, Japanese Patent Application Laid-open No.2006-122086 (hereinafter, referred to as Patent Document 2) discloses ahead attachment support method for an optical topography (registeredtrademark) that makes a sound announcement when a sensor approaches anoptimal attachment position.

SUMMARY

However, in the method described in Patent Document 1, it is difficultfor the user to grasp an accurate attachment position because the headshape varies in users. Further, in the method of Patent Document 2, itis difficult for the user to rapidly attach the sensor at an appropriateattachment position. In addition, even by any method, it is difficult todetermine whether or not the sensor is appropriately attached beforemeasurement is carried out.

In view of the above-mentioned circumstances, it is desirable to providean information processing apparatus, a program, and a biosignalmeasurement set that enable a user to appropriately attach a biologicaldetection sensor to a living body of the user.

According to an embodiment of the present disclosure, there is providedan information processing apparatus including a retaining unit, an imageacquisition unit, an image processor, a comparator, and an imagegenerator.

The retaining unit is configured to retain a defined attachment positionbeing an attachment position of a biological detection sensor withrespect to a body site of a user, the defined attachment position beingdefined in advance.

The image acquisition unit is configured to acquire a capture imagecaptured by an imaging unit.

The image processor is configured to extract, from the capture image, abody shape of the user.

The comparator is configured to compare the body shape with the definedattachment position.

The image generator is configured to generate, based on a comparisonresult by the comparator, a display image to be displayed on a displayunit.

With this configuration, corresponding to the body shape of the userincluded in the capture image captured by the imaging unit, an image towhich the defined attachment position is reflected is displayed on thedisplay unit as the display image. Therefore, irrespective ofdifferences in the body shape among the users and a relative positionrelationship between the user and the imaging unit, the user can grasp arelationship between the body shape of the user and the definedattachment position included in the capture image.

The image generator may be configured to generate the display image byoverlapping the capture image with a marker located at a position on thecapture image, the position corresponding to the defined attachmentposition.

With this configuration, the user can grasp the attachment position ofthe biological detection sensor, referring to the marker displayed inthe display image.

The image processor may be configured to further detect, from thecapture image, a detected attachment position being an attachmentposition of a biological detection sensor.

The comparator may be configured to further compare the definedattachment position with the detected attachment position.

With this configuration, the user can grasp a position relationshipbetween a position at which the biological detection sensor is attachedto the user (detected attachment position) and a position at which thebiological detection sensor is to be normally attached (definedattachment position), by referring to the display image.

The image generator may be configured to generate, when the definedattachment position is different from the detected attachment position,the display image by overlapping the capture image with a marker locatedat a position on the capture image, the position corresponding to thedefined attachment position different from the detected attachmentposition.

With this configuration, the user can grasp the fact that the positionat which the biological detection sensor is attached to the user(detected attachment position) and the position at which the biologicaldetection sensor is to be normally attached (defined attachmentposition) are different from each other, owing to the marker displayedin the display image. In addition, the user can grasp the normalattachment position for the different biological detection sensor owingto the marker displayed at a position corresponding to the definedattachment position on the display image.

The information processing apparatus further includes a sensordetermination unit configured to determine an attachment state of thebiological detection sensor.

The image generator may be configured to further generate the displayimage based on a determination result of the sensor determination unit.

With this configuration, a determination result of the attachment stateof the biological detection sensor by the sensor determination unit isreflected to the display image. Therefore, the user can grasp whether ornot the attachment state of the biological detection sensor attached tothe user is appropriate.

The image generator may be configured to generate, when the attachmentstate is inappropriate, the display image by overlapping the captureimage with a marker located at a position on the capture image, theposition corresponding to the defined attachment position of thebiological detection sensor the attachment state of which isinappropriate.

With this configuration, the user can grasp the biological detectionsensor in which an attachment target is inappropriate (contact with bodysurface is insufficient, for example) owing to the marker displayed inthe display image, and can perform a countermeasure such asre-attachment or the like of the biological detection sensor.

The biological detection sensor may include an electroencephalographicelectrode.

The sensor determination unit may be configured to determine theattachment state based on contact resistance of theelectroencephalographic electrode.

Whether or not the electroencephalographic electrode is held in firmcontact with the scalp of the user is generally checked by measurementof contact resistance between the electroencephalographic electrode andthe scalp before brain waves are measured in electroencephalographicmeasurement. That is because the contact resistance significantlyincreases if contact with the electroencephalographic electrode isinsufficient. Therefore, with this configuration, the sensordetermination unit can determine the attachment state of theelectroencephalographic electrode based on the contact resistance.

According to another embodiment of the present disclosure, there isprovided a program including a retaining unit, an image acquisitionunit, an image processor, a comparator, and an image generator.

The retaining unit is configured to retain a defined attachment positionbeing an attachment position of a biological detection sensor withrespect to a body site of a user, the defined attachment position beingdefined in advance.

The image acquisition unit is configured to acquire a capture imagecaptured by an imaging unit.

The image processor is configured to extract, from the capture image, abody shape of the user.

The comparator is configured to compare the body shape with the definedattachment position.

The image generator is configured to generate, based on a comparisonresult by the comparator, a display image to be displayed on a displayunit.

According to still another embodiment of the present disclosure, thereis provided a biosignal measurement set including a biosignalmeasurement apparatus and an information processing apparatus.

The biosignal measurement apparatus includes a biological detectionsensor configured to detect a biosignal in a body of a user.

The information processing apparatus includes a retaining unitconfigured to retain a defined attachment position being an attachmentposition of the biological detection sensor to a body site of a user,the defined attachment position being defined in advance, an imageacquisition unit configured to acquire a capture image captured by animaging unit, an image processor configured to extract, from the captureimage, a body shape of the user, a comparator configured to compare thebody shape with the defined attachment position, and an image generatorconfigured to generate, based on a comparison result by the comparator,a display image to be displayed on a display unit.

As mentioned above, according to the embodiments of present disclosure,it is possible to provide an information processing apparatus, aprogram, and a biosignal measurement set that enable a user toappropriately attach a biological detection sensor to a living body ofthe user.

These and other objects, features and advantages of the presentdisclosure will become more apparent in light of the following detaileddescription of best mode embodiments thereof, as illustrated in theaccompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic view showing a configuration of a biosignalmeasurement set according to an embodiment of the present disclosure;

FIG. 2 is a schematic view showing a functional configuration of aninformation processing apparatus constituting the biosignal measurementset;

FIG. 3 is an example of a capture image captured by an imaging unit ofthe information processing apparatus constituting the biosignalmeasurement set;

FIG. 4 is a schematic view showing a body shape of a user that isextracted by an image processor of the information processing apparatusconstituting the biosignal measurement set;

FIG. 5 is a schematic view showing a defined attachment positionassociated with the body shape by a comparator of the informationprocessing apparatus constituting the biosignal measurement set;

FIG. 6 is an example of a display image generated by the image generatorof the information processing apparatus constituting the biosignalmeasurement set;

FIG. 7 is an example of a capture image captured by an imaging unit ofthe information processing apparatus constituting the biosignalmeasurement set;

FIG. 8 is a schematic view showing a detected attachment positiondetected by an image processor of the information processing apparatusconstituting the biosignal measurement set;

FIG. 9 is a schematic view showing the defined attachment position andthe detected attachment position compared by the comparator of theinformation processing apparatus constituting the biosignal measurementset;

FIG. 10 is an example of the display image generated by the imagegenerator of the information processing apparatus constituting thebiosignal measurement set; and

FIG. 11 is an example of the display image generated by the imagegenerator of the information processing apparatus constituting thebiosignal measurement set.

DETAILED DESCRIPTION OF EMBODIMENTS

A biosignal measurement set according to an embodiment of the presentdisclosure will be described.

[Configuration of Biosignal Measurement Set]

FIG. 1 is a schematic view showing a configuration of a biosignalmeasurement set 100 according to this embodiment. As shown in thefigure, the biosignal measurement set 100 includes an informationprocessing apparatus 110 and a biosignal measurement apparatus 150.

The information processing apparatus 110 includes various informationprocessing apparatuses such as a smart phone, a tablet personal computer(PC), and a desktop PC. The information processing apparatus 110 is notparticularly limited. The biosignal measurement apparatus 150 is anapparatus that includes biosignal detection sensors 151 attached to thebody of a user (user U in figure) and measures biosignals from the bodyof the user. Hereinafter, it is assumed that the biosignal measurementapparatus 150 is an electroencephalographic apparatus that measuresbrain waves of the user. However, the biosignal measurement apparatus150 is not limited thereto. The biosignal measurement apparatus 150 maybe an apparatus that measures various biosignals such aselectrocardiogram, blood oxygen saturation level (SpO2), and bloodpressure.

The information processing apparatus 110 and the biosignal measurementapparatus 150 may be connected to each other by a wirelesscommunication. Note that the information processing apparatus 110 andthe biosignal measurement apparatus 150 may be connected to each othervia a wire. The information processing apparatus 110 and the biosignalmeasurement apparatus 150 may also be connected to each other viaanother apparatus.

The information processing apparatus 110 includes a central processingunit (CPU) and a memory. A functional configuration as follows isrealized in cooperation with a read-in program. FIG. 2 is a schematicview showing a functional configuration of the information processingapparatus 110. As shown in the figure, the information processingapparatus 110 includes an imaging unit 111, an image acquisition unit112, an image processor 113, a retaining unit 114, a comparator 115, asensor determination unit 116, an image generator 117, and a displayunit 118.

The imaging unit 111 includes an optical system, an imaging element, andthe like. The imaging unit 111 captures an image (including movingimage) in the range of vision. One having a field of view in the samedirection as the display unit 118 in the information processingapparatus 110 is favorably used as the imaging unit 111 (see FIG. 1).Alternatively, the imaging unit 111 may be configured independently ofthe information processing apparatus 110 and may be connected to theinformation processing apparatus 110 via a wiring or the like. Theimaging unit 111 provides a captured image (hereinafter, referred to ascapture image) to the image acquisition unit 112.

The image acquisition unit 112 acquires the capture image captured bythe imaging unit 111. Note that the image acquisition unit 112 mayacquire the capture image directly from the imaging unit 111 or mayacquire the capture image via a network or the like. The imageacquisition unit 112 provides the acquired capture image to the imageprocessor 113 and the image generator 117.

The image processor 113 performs image processing on the capture imageand extracts the body shape of the user included in the capture image.Extraction of the body shape can be performed by utilizing a well-knownedge detection algorithm, facial recognition algorithm, or the like. Theimage processor 113 provides the extracted body shape of the user to thecomparator 115. In addition, after the user attaches the biosignaldetection sensors 151 to the body of the user, the image processor 113may recognize the biosignal detection sensors 151 and detect positionsthereof (hereinafter, referred to as detected attachment positions). Theimage processor 113 may recognize the biosignal detection sensors 151 byutilizing identification indicators provided to the biosignal detectionsensors 151 in advance. In this case, the image processor 113 providesalso the detected attachment positions to the comparator 115.

The retaining unit 114 retains attachment positions (hereinafter,referred to as defined attachment positions) of the biological detectionsensors 151 with respect to the body site of the user, the attachmentpositions being defined in advance. In the case where the biosignaldetection sensors 151 are electroencephalographic electrodes, thedefined attachment positions are, for example, based on an electrodearrangement complying with the International 10-20 System. In additionto this, depending on the kind and measurement purpose of the biosignaldetection sensors 151, the defined attachment positions can beappropriately set. The retaining unit 114 may retain the definedattachment positions in a storage or the like or may acquire the definedattachment positions via a network. The retaining unit 114 provides theretained defined attachment positions to the comparator 115.

The comparator 115 compares the body shape of the user extracted fromthe capture image by the image processor 113 with the defined attachmentpositions supplied from the retaining unit 114. Specifically, thecomparator 115 compares the body shape of the user in the capture imagewith the body shape that is a reference for the defined attachmentpositions. The comparator 115 associates the defined attachmentpositions with the body shape of the user in the capture image. Thecomparator 115 provides that comparison result to the image generator117. Further, when the comparator 115 is provided with the detectedattachment positions from the image processor 113, the comparator 115performs a comparison of the associated defined attachment positions andthe detected attachment positions, and provides a comparison result tothe image generator 117.

A sensor determination unit 116 determines attachment state of each ofthe biosignal detection sensors 151. Specifically, the attachment statemeans an attachment direction of the biosignal detection sensor 151, adegree of contact of the biosignal detection sensor 151 with a surfaceof a living body, and the like. The sensor determination unit 116 canacquire, for example, contact resistance between the biosignal detectionsensor 151 and the surface of the living body from the biosignalmeasurement apparatus 150. When the contact between the biosignaldetection sensor 151 and the surface of the living body is insufficient,the contact resistance significantly increases. Therefore, the sensordetermination unit 116 can determine, based on the contact resistance,the attachment state of the biosignal detection sensor 151. Other thanthe contact resistance, the sensor determination unit 116 can determine,based on information indicating the attachment state of the biosignaldetection sensor 151, the attachment state of the biosignal detectionsensor 151. The sensor determination unit 116 provides a determinationresult to the image generator 117.

The image generator 117 generates, based on the comparison result by thecomparator 115, an image to be displayed by the display unit 118(hereinafter, referred to as display image). Specifically, the imagegenerator 117 may generate the display image by overlapping a marker onthe capture image provided from the image acquisition unit 112. Themarker is located at the defined attachment position (comparison result)associated with the body shape of the user in the capture image. Withthis, an image in which the marker is located at a positioncorresponding to the defined attachment position in a picture of theuser within the capture image is generated as the display image.

Further, when the image generator 117 is provided with the comparisonresult of the defined attachment position and the detected attachmentposition from the comparator 115, the image generator 117 may generatethe display image based on that comparison result. Specifically, whenthe defined attachment position is different from the detectedattachment position, that is, when the biosignal detection sensor 151attached by the user is not attached at the defined attachment position,the image generator 117 may locate the marker at a position (normalattachment position) on the capture image, the position corresponding tothe defined attachment position.

In addition, when the image generator 117 is provided with adetermination result of the attachment state of the biosignal detectionsensor 151 from the sensor determination unit 116, the image generator117 may generate the display image based on the attachment state.Specifically, the image generator 117 may locate the marker at aposition (normal attachment position) on the capture image, the positioncorresponding to the defined attachment position of the biosignaldetection sensor 151 the attachment state of which is inappropriate. Theimage generator 117 provides the generated display image to the displayunit 118.

The display unit 118 includes an image display element and the like anddisplays the display image provided from the image generator 117.Further, the display unit 118 may be configured independently of theinformation processing apparatus 110 and may display the display imageprovided via a wire or the like.

The information processing apparatus 110 has the above-mentionedconfiguration.

The biosignal measurement apparatus 150 includes the biosignal detectionsensors 151 and a control unit 152. The number of biosignal detectionsensors 151 may be one or more. Each of the biosignal detection sensors151 is connected to the control unit 152 in a wired or wireless manner.

The biosignal detection sensors 151 are attached to the body of the userand detect biosignals of the user. The biosignals may be any of varioussignals indicating states of a living body such as brain waves,electrocardiogram, electromyogram, blood oxygen saturation level (SpO2),and blood pressure. Each of the biosignal detection sensors 151 onlyneeds to be capable of detecting a biosignal being a measurement targetand attached to the body of the user. For example, the biosignaldetection sensor 151 may be a brain wave detection electrode. Thebiosignal detection sensor 151 provides the detected biosignal to thecontrol unit 152. Further, the biosignal detection sensor 151 may beprovided with an identification indicator (e.g., light emitting unit) tobe utilized by the image processor 113 to recognize the biosignaldetection sensor 151.

The control unit 152 includes a signal processing circuit and the likeand processes outputs of the biosignal detection sensors 151.Alternatively, the control unit 152 may include a wireless communicationmodule and transmit the outputs of the biosignal detection sensors 151(including output processing results) to the information processingapparatus 110.

The biosignal measurement apparatus 150 has the above-mentionedconfiguration. Note that the biosignal measurement apparatus 150 mayinclude equipment for attaching the biosignal detection sensors 151 tothe body of the user.

[Operation of Biosignal Measurement Set]

An operation of the biosignal measurement set 100 will be described.

The user directs the imaging unit 111 of the information processingapparatus 110 to the user. Capturing of the capture image is started.Although capturing of the capture image may be continuously performed,that is, the capture images may constitute a moving image, one captureimage will be described as an example in the following description. FIG.3 shows a capture image G1 as an example of the capture image.

The image acquisition unit 112 acquires the capture image G1 from theimaging unit 111 and provides the capture image G1 to the imageprocessor 113 and the image generator 117.

The image processor 113 extracts the body shape of the user from thecapture image G1. FIG. 4 is a schematic view showing a body shape S ofthe user extracted by the image processor 113. The image processor 113provides the extracted body shape S to the comparator 115.

The comparator 115 compares the body shape S with the defined attachmentposition provided from the retaining unit 114. The comparator 115associates the body shape S and the defined attachment position witheach other. FIG. 5 shows defined attachment positions P1 associated withthe body shape S by the comparator 115. The comparator 115 provides acomparison result thereof to the image generator 117.

The image generator 117 locates markers at the defined attachmentpositions P1 on the capture image G1 and generates the display image.FIG. 6 shows a display image H1 generated by the image generator 117.The markers located at the defined attachment positions P1 in thedisplay image H1 are shown as markers M1. The image generator 117provides the display image H1 to the display unit 118.

The display unit 118 displays the display image H1. With this, the useris allowed to check a position at which the biosignal detection sensor151 is to be attached in the display image H1. As mentioned above, themarkers M1 are located based on the body shape S of the user extractedfrom the capture image G1, and hence the positions are adjusteddepending on an individual difference of the body shape of the user.Further, even if the user moves the body or the imaging unit 111 incapturing the capture image G1, the above-mentioned process is performedon the newly captured capture image G1 and the display image H1 isgenerated. Therefore, the markers M1 move following the body shape ofthe user. Therefore, referring to the display image H1, the user canaccurately grasp a position at which the biosignal detection sensor 151is to be attached.

Subsequently, it is assumed that the user attaches the biosignaldetection sensor 151 to the user, referring to the display image H1.FIG. 7 shows a capture image G2 captured by the imaging unit 111.

The image processor 113 detects the detected attachment position beingthe attachment position of the biosignal detection sensor 151 togetherwith the body shape of the user in the capture image G2. FIG. 8 showsdetected attachment positions P2 detected by the image processor 113.The image processor 113 provides the detected attachment positions P2 tothe comparator 115.

The comparator 115 compares the defined attachment positions P1 with thedetected attachment positions P2. FIG. 9 shows the defined attachmentpositions P1 and the detected attachment positions P2. As shown in thefigure, when one of the detected attachment positions P2 is differentfrom the defined attachment position P1, that is, if the position of oneof the biosignal detection sensors 151 is different from an appropriateattachment position, the comparator 115 provides that difference to theimage generator 117 as a comparison result.

When the image generator 117 is provided with the difference between thedetected attachment position P2 and the defined attachment position P1from the comparator 115, the image generator 117 generates a displayimage by locating a marker at the defined attachment position P1 on thecapture image G2, at which the difference occurs. FIG. 10 shows adisplay image H2 generated by the image generator 117. The markerlocated at the defined attachment position P1 in the display image H2,at which the difference occurs, is shown as a marker M2. The imagegenerator 117 may warn the user by blinking the marker M2 or by changinga color, for example. Further, the image generator 117 may also displaythe markers M1 in the display image H2. The image generator 117 providesthe display image H2 to the display unit 118.

The display unit 118 displays the display image H2. With this, the usercan check that the biosignal detection sensor 151 is attached at aposition different from a position at which the biosignal detectionsensor 151 is to be normally attached.

Further, after the user attaches the biosignal detection sensor 151 tohim or her, the sensor determination unit 116 determines the attachmentstate of the biosignal detection sensor 151. Specifically, the sensordetermination unit 116 may acquire, from the control unit 152 of thebiosignal measurement apparatus 150, an output (contact resistance,etc.) of the biosignal detection sensor 151. Based on the acquiredoutput, the sensor determination unit 116 determines whether or not theattachment state of the biosignal detection sensor 151 is appropriate.The sensor determination unit 116 provides a determination result to theimage generator 117.

When the image generator 117 is provided with a determination resultfrom the sensor determination unit 116, the image generator 117generates the display image by locating the marker at the definedattachment position of the biosignal detection sensor 151 the attachmentstate of which is inappropriate, or in vicinity thereof. FIG. 11 shows adisplay image H3 generated by the image generator 117. In the displayimage H3, the marker located in vicinity of the biosignal detectionsensor 151 the attachment state of which is inappropriate is shown as amarker M3. The image generator 117 may warn the user by blinking themarker M3 or changing a color, for example. Further, the image generator117 may display also the markers M1 in the display image H3 and maypresent, to the user, the fact that the attachment state is appropriateby changing a color, for example. The image generator 117 provides thedisplay image H3 to the display unit 118.

The display unit 118 displays the display image H3. With this, the usercan check whether or not the attachment state of the biosignal detectionsensor 151 is appropriate.

As mentioned above, with the biosignal measurement set 100 according tothis embodiment, the user can easily grasp a position at which thebiosignal detection sensor 151 is to be attached. Further, also afterthe biosignal detection sensor 151 is attached, it is possible to graspa difference of the attachment position or appropriateness orinappropriateness of the attachment state. It becomes possible toaccurately measure a biosignal.

The present disclosure is not limited only to the above-mentionedembodiment and may be changed without departing from the gist of thepresent disclosure.

In the above-mentioned embodiment, the information processing apparatusdisplays the marker at the attachment position of the biologicaldetection sensor. However, the information processing apparatus maydisplay an attachment method for the biological detection sensortogether with the marker. Alternatively, the information processingapparatus may present the attachment position of the biologicaldetection sensor to the user by displaying the marker with sound.

Further, in the above-mentioned embodiment, by recording the captureimage captured by the imaging unit, another person (doctor, etc.) canthereafter check the attachment state of the biological detection sensorof the user. With this, if a measurement result is abnormal, forexample, that person can utilize the capture image for determining areason for this. Alternatively, the capture image may be provided tothat person via a network at real time.

It should be noted that the present disclosure may also take thefollowing configurations.

(1) An information processing apparatus, including:

a retaining unit configured to retain a defined attachment positionbeing an attachment position of a biological detection sensor withrespect to a body site of a user, the defined attachment position beingdefined in advance;

an image acquisition unit configured to acquire a capture image capturedby an imaging unit;

an image processor configured to extract, from the capture image, a bodyshape of the user;

a comparator configured to compare the body shape with the definedattachment position; and

an image generator configured to generate, based on a comparison resultby the comparator, a display image to be displayed on a display unit.

(2) The information processing apparatus according to Item (1), in whichthe image generator is configured to generate the display image byoverlapping the capture image with a marker located at a position on thecapture image, the position corresponding to the defined attachmentposition.

(3) The information processing apparatus according to Item (1) or (2),in which

the image processor is configured to further detect, from the captureimage, a detected attachment position being an attachment position of abiological detection sensor, and

the comparator is configured to further compare the defined attachmentposition with the detected attachment position.

(4) The information processing apparatus according to any one of Items(1) to (3), in which

the image generator is configured to generate, when the definedattachment position is different from the detected attachment position,the display image by overlapping the capture image with a marker locatedat a position on the capture image, the position corresponding to thedefined attachment position different from the detected attachmentposition.

(5) The information processing apparatus according to any one of Items(1) to (4), further including

a sensor determination unit configured to determine an attachment stateof the biological detection sensor, in which

the image generator is configured to further generate the display imagebased on a determination result of the sensor determination unit.

(6) The information processing apparatus according to any one of Items(1) to (5), in which

the image generator is configured to generate, when the attachment stateis inappropriate, the display image by overlapping the capture imagewith a marker located at a position on the capture image, the positioncorresponding to the defined attachment position of the biologicaldetection sensor the attachment state of which is inappropriate.

(7) The information processing apparatus according to any one of Items(1) to (6), in which

the biological detection sensor includes an electroencephalographicelectrode, and

the sensor determination unit is configured to determine the attachmentstate based on contact resistance of the electroencephalographicelectrode.

(8) A program that causes an information processing apparatus tofunction as:

a retaining unit configured to retain a defined attachment positionbeing an attachment position of a biological detection sensor withrespect to a body site of a user, the defined attachment position beingdefined in advance;

an image acquisition unit configured to acquire a capture image capturedby an imaging unit;

an image processor configured to extract, from the capture image, a bodyshape of the user;

a comparator configured to compare the body shape with the definedattachment position; and

an image generator configured to generate, based on a comparison resultby the comparator, a display image to be displayed on a display unit.

(9) A biosignal measurement set, including:

a biosignal measurement apparatus including a biological detectionsensor configured to detect a biosignal in a body of a user; and

an information processing apparatus including

-   -   a retaining unit configured to retain a defined attachment        position being an attachment position of the biological        detection sensor to a body site of a user, the defined        attachment position being defined in advance,    -   an image acquisition unit configured to acquire a capture image        captured by an imaging unit,    -   an image processor configured to extract, from the capture        image, a body shape of the user,    -   a comparator configured to compare the body shape with the        defined attachment position, and    -   an image generator configured to generate, based on a comparison        result by the comparator, a display image to be displayed on a        display unit.

The present disclosure contains subject matter related to that disclosedin Japanese Priority Patent Application JP 2012-173357 filed in theJapan Patent Office on Aug. 8, 2012, the entire content of which ishereby incorporated by reference.

It should be understood by those skilled in the art that variousmodifications, combinations, sub-combinations and alterations may occurdepending on design requirements and other factors insofar as they arewithin the scope of the appended claims or the equivalents thereof.

What is claimed is:
 1. An information processing apparatus, comprising:circuitry configured to: acquire an image of a user with a biosignaldetection sensor; acquire information indicating an attachment state ofthe biosignal detection sensor; and provide at least one of a firstdegree of accuracy of an attachment position of the biosignal detectionsensor or a second degree of accuracy of the attachment state of thebiosignal detection sensor based on the image and the information,wherein the information indicating the attachment state includes atleast one of an attachment direction of the biosignal detection sensoror a degree of contact of the biosignal detection sensor.
 2. Theinformation processing apparatus according to claim 1, wherein thecircuitry is further configured to display the image with a markerlocated at a position on the image, wherein the position corresponds toa defined attachment position.
 3. The information processing apparatusaccording to claim 1, wherein the circuitry is further configured todisplay the image with a marker located at a position on the image togenerate a display image based on a defined attachment position that isdifferent from a detected attachment position detected from the acquiredimage, wherein the position corresponds to the defined attachmentposition different from the detected attachment position.
 4. Theinformation processing apparatus according to claim 1, wherein thebiosignal detection sensor includes an electroencephalographicelectrode, and wherein the circuitry is further configured to determinethe attachment state based on contact resistance of theelectroencephalographic electrode.
 5. The information processingapparatus according to claim 1, wherein the circuitry is furtherconfigured to: detect the attachment position of the biosignal detectionsensor from the image; compare the detected attachment position with adefined attachment position of the biosignal detection sensor; andprovide the first degree of accuracy based on the comparison.
 6. Aninformation processing method, comprising: in an information processingapparatus: acquiring an image of a user with a biosignal detectionsensor; acquiring information indicating an attachment state of thebiosignal detection sensor; and providing at least one of a first degreeof accuracy of an attachment position of the biosignal detection sensoror a second degree of accuracy of the attachment state based on theimage and the information, wherein the information indicating theattachment state includes at least one of an attachment direction of thebiosignal detection sensor or a degree of contact of the biosignaldetection sensor.
 7. A non-transitory computer-readable medium havingstored thereon computer-readable instructions, which when executed by acomputer, cause the computer to execute operations, the operationscomprising: acquiring an image of a user with a biosignal detectionsensor; acquiring information indicating an attachment state of thebiosignal detection sensor; and providing at least one of a first degreeof accuracy of an attachment position of the biosignal detection sensoror a second degree of accuracy of the attachment state based on theimage and the information, wherein the information indicating theattachment state includes at least one of an attachment direction of thebiosignal detection sensor or a degree of contact of the biosignaldetection sensor.